Aurora Archer IS1200 Installation & Operating Instructions Manual page 45

Initial Start-Up.
Manual burner level selection
Press and hole the "ON" button (Fig. 4) for at least 2 seconds to enable the ignition sequence. (see Section 11.5)
Use the "UP" and "DOWN" (Fig. 4) buttons to increase and decrease the gas flow to burner. The
operation is not cyclic.
In manual mode its not possible to have a level lower than level 1.
AUTO mode operation
when AUTO mode is selected, the automatic modulation is enabled the system setting its operation
depending on the values of T
Modulation
T is checked band compared with T
ROOM
burner level is updated by one step at each temperature check:
T > T
SET ROOM =
T < T
SET ROOM =
As long as T < T
SET
T > T , the burner level is decreased down to STANDBY position; when in this position, icon
SET ROOM
"PILOT" appears.
The motor remains in the updated burner level until the next temperature check occurs, that is until the
temperature check waiting time is expired. When in MIN position (level 1), if temperature check results
T T , the system remains in this position for a time tcheck_MIN, after that, if T
ROOM > SET
T condition is still valid, its proceeds to STANDBY
SET
In the following table are listed the different waiting times for each burner level.
BURNER LEVEL
STANDBY level (PILOT)
LEVEL 1 (MIN) to STANDBY
LEVEL 1 (MIN)
LEVEL 2
LEVEL 3
LEVEL 4
LEVEL 5 (MAX)
(1) This waiting timer is reset in case of manual update of T
(2) See "Functional parameters" table
STANDBY level exit conditions
The system moves out from STANBDY level if:
1) Temperature check waiting timer has expired and TROOM < TSET
2) While in STANDBY position, in case of manual update of TSET > TROOM, regardless
temperature check waiting timer value.
STANDBY level exit behaviour
When the system does back to modulation, it proceeds as follows:
The system moves to level 1 and here remains for a time T
table) and from this point operates according modulation algorithm, as explained at par. "Modulation"
REMOTE INSTRUCTIONS
and T
SET
burner level INCREASE.
.burner level DECREASE.
, the burner is increased up to MAX (level 5), remaining in this state until
ROOM
.
ROOM
at fixed time intervals and depending on these values, the
SET
TEMPERATURE CHECK WAITING TIME
t
CHECK_STANDBY (1)(2)
Table 2.
SET
CHECK_LEVEL
44
t
CHECK_MIN (2)
t
CHECK_LEVEL (2)
above T
ROOM
(see "Functional parameters"
ROOM >